Sunday

March 29, 2015

March 29, 2015

Posted by **Anonymous** on Thursday, November 27, 2008 at 12:20pm.

- physics -
**drwls**, Thursday, November 27, 2008 at 12:40pmYou want to remove M C (delta T) = 300 g*1.00 Cal/(g C) * 29 C = 8700 calories from the coffee. If m is the mass of ice you add, the heat absorbed by the ice while melting and incresing in temperature from -20 to +58 C is

m*Cice*(20) + mCwater*58 + m*80 Cal/g

The specific heat of ice, Cice = 0.51 Cal/g C

8700 cal = 10.2 m + 58 m + 80 m = 148.2

Solve for m

- physics -
**DrBob222**, Thursday, November 27, 2008 at 12:42pmq1 = heat to move ice from -20 to zero.

q1 = mass ice x specific heat ice x (Tfinal-Tinitial). [Tf will be 0 and Ti will be -20 but watch that sign since it will change.

q2 = heat to melt the ice.

q2 = mass ice x heat fusion.

q3 = heat to move ice from zero to 58.

q3 = mass ice x specific heat water (its now a liquid) x (58-0).

q4 = loss of heat to move 300 mL water from 87 to 58.

q4 = mass water x specific heat water x (58-87).

q1 + q2 + q3 + q4 = 0

You have only one unknown in all of the above which is mass ice. Solve for that. Check my thinking. I won't be on for the next 6 hours or so.

**Answer this Question**

**Related Questions**

Chemistry - At a local convenience store, you purchase a cup of coffee, but, at ...

Math Middle School - Please help me solve this challenge problem: I love hot ...

MATH MIDDLE SCHOOL - I love chocolate and coffee. I begin by making one cup of ...

Chemistry/Calorimetry - You buy coffee (200.0 ml) served in a styrofoam cup. You...

physics - An insulated Thermos contains 140 cm3 of hot coffee at 89.0°C. You put...

physics - An insulated Thermos contains 140 cm3 of hot coffee at 89.0°C. You put...

Physics - 5) An insulated Thermos contains 190 cm3 of hot coffee at 79.0°C. You ...

Science - Suppose in a restaurant your coffee is served about 5 or 10 minutes ...

physics - The "steam" above a freshly made cup of instant coffee is really water...

physics - The "steam" above a freshly made cup of instant coffee is really water...